We got David Friday night in WeHo outside Delilah, and asked about rumors Gronk will hang up his Patriots jersey for a Hollywood acting career.

David says screw Julliard ... acting's about being real, and it don't get more real than Gronk.

Gronk has already tested his acting chops in a movie and has done several commercials, including one for the Madden NFL 17 video game.

Gotta say ... maybe a semester at Julliard wouldn't hurt.